Polaris Sportsman 400 Service Manual page 86

ENGINE REMOVAL
REFER TO PAGE 3.8 - 3.10 FOR ENGINE REMOVAL / INSTALLATION NOTES.
CAM CHAIN TENSIONER/ROCKER ARM/CAMSHAFT REMOVAL
1. Remove ignition timing inspection plug from recoil housing.
To position crankshaft at Top Dead Center
(TDC) on compression stroke:
2. Rotate engine slowly in the direction of rotation
watching intake valves open and start to close.
3. Continue to rotate engine slowly, watching
camshaft sprocket marks and the mark in the timing
inspection hole.
4. Align single (TDC) mark on flywheel with projection
in inspection hole, and the cam sprocket pin (facing
upward) aligned with the camshaft to crankshaft
center line. NOTE:
pointing down and valves should have clearance at
this point.
5. Remove cam chain tensioner plug, sealing washer,
and spring. CAUTION: The plug is under spring
tension. Maintain inward pressure while removing.
6. Remove the two 6x25 mm cam chain tensioner
flange bolts.
7. Tap lightly on tensioner body with a soft face
hammer and remove tensioner.
- projex@inbox.lv -
The cam lobe should be
TDC "T" Mark
Rotation
ENGINE
Advance Marks
3.17